In a Wheatstone bridge, if the bridge is balanced, what can be said about the ratio of the resistances?
Correct Answer: R1/R2 = R3/R4
- Step 1: Understand that a Wheatstone bridge has four resistors arranged in a diamond shape.
- Step 2: Identify the resistors as R1, R2, R3, and R4.
- Step 3: Know that the bridge is balanced when there is no current flowing through the middle part of the bridge.
- Step 4: When the bridge is balanced, the voltage across the middle part is zero.
- Step 5: This condition leads to the relationship between the resistors: the ratio of R1 to R2 is equal to the ratio of R3 to R4.
- Step 6: Write this relationship as R1/R2 = R3/R4.
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